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VashaNatasha [74]
2 years ago
5

The distance between Polaris and Earth in

Physics
1 answer:
galben [10]2 years ago
4 0

Answer:

4.1 × 10^18 meters.

Explanation :

speed = distance ÷ time.

distance = speed × time.

time in seconds = 431 ×365 × 24 × 60 × 60

= 13,592,016,000 secs

distance = 3 × 10^8 × 13,592,016,000

= 40,776,048,000 × 10^8

= 4.1 × 10^18 meters.

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The Venn diagram compares protons with neutrons. Which shared property belongs in the region marked "B"?
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3 years ago
How do you determine the acceleration of an object?
Gelneren [198K]

Are you familiar with any basic calculus? If so, we can just look at this derivative and see what's happening with our units here..

a = \frac{dv}{dt}

Here it shows that acceleration is the derivative of velocity with respect to time. In other words, we can say that:

a=\frac{\Delta v}{\Delta t}

We can read that equation as: "acceleration is the change of velocity divided by the change in time (aka the time interval)."

If you're not familiar with calculus, we can use a simple equation of motion:

v_f = v_i+at

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a = \frac{v_f - v_i}{t}

This is the same exact thing we wrote before!

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3 years ago
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Meteorite On October 9, 1992, a 27-pound meteorite struck a car in Peekskill, NY, creating a dent about 22 cm deep. If the initi
Rom4ik [11]

Answer:

8427375 N

Explanation:

From newton's equation of motion,

F = ma................. Equation 1

Where F = average force exerted on the meteorite by the car, m = mass of the meteorite, a = acceleration.

We can find the value of acceleration from newton's equation of motion

using,

v² = u²+2as.................. Equation 2

Where v = final velocity, u = initial velocity, a = acceleration, s = distance.

Make a the subject of the equation

a = (v²-u²)/2s............... Equation 3

Note: When the meteorite struck the car, it was brought to rest

Given: u = 550 m/s, v = 0 m/s ( brought to rest), s = 22 cm = 0.22 m

Substitute into equation 3

a = (0²-550²)/(2×0.22)

a = -302500/0.44

a = -687500 m/s²

Also given: m = 27 pound = (27×0.454) = 12.258 kg

Substitute into equation 1

F = 12.258(-687500)

F = -8427375 N

Note: The negative sign tells that the force act in opposite direction to the motion of the meteorite

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3 years ago
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A water wave has a frequency of 2 HZ and a wavelength of 5 meters what is its speed
Sliva [168]
Speed, v = fλ.

Where f is the frequency in Hertz, wavelength is in meters.

Speed, v = 2*5 = 10

Speed = 10 m/s. 
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